Plumb the handle signals state to Awakable::Awake().

mojo/edk/system/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("../mojo_edk.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
 }
 
 mojo_edk_source_set("system") {
   sources = [
     "async_waiter.cc",
     "async_waiter.h",
+    "awakable.cc",
     "awakable.h",
     "awakable_list.cc",
     "awakable_list.h",
     "channel.cc",
     "channel.h",
     "channel_endpoint.cc",
     "channel_endpoint.h",
     "channel_endpoint_client.h",
     "channel_endpoint_id.cc",
     "channel_endpoint_id.h",
@@ skipping 185 matching lines @@
     # TODO(vtl): Add separate test targets for this.
     "mojo/edk/util:perftests",
 
     "mojo/edk/base_edk",
     "mojo/edk/base_edk:test_base_edk",
     "mojo/edk/system/test",
     "mojo/edk/system/test:perf",
     "mojo/edk/test:test_support",
   ]
 }